Douglas,

I tried that one time when the temp had increased 50°F from the time I landed to when I wanted to take off. It didn't work. I have pressure gauges under my passenger seat. When I looked at the gauges, both pressures were at about 1,300 PSI. The internal pump valves must have open at that pressure. The dump valve did no good at all. Your solution only works if you don't need to use it.

Wolfgang's 10 minute fix solves all of the pump problems, on the ground and in the air.  You can contact him at 248-471-2000 or call me at the number below.

Lorn

> From: Douglas Brunner <douglasbrunner@earthlink.net>
> Date: April 1, 2011 4:27:52 PM EDT
>
> I have incorporated what I call a "gear burp" into my checklist as part of the runup.
>  
> What I do is breifly open and close the hydraulic gear dump valve.  The gear pump will run briefly then shut down.
>  
> Prior to doing the "gear burp" regularly, I had a number of instances when my gear would not come up.  Since then - none.
>  
> D. Brunner
> Legacy N241DB - 500 hours

--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,790 hrs, N31161, Y47, SE Michigan